The iPhone 4S (available on Verizon, AT&T, and Sprint) and the Samsung Galaxy S II (available on T-Mobile, AT&T, and Sprint) are two of the best smartphones on the market right now. In this video we compare program launching speed, web browsing performance, gaming smoothness, specs, 1080p video recording, and even artificial intelligence in terms of the digital assistant software included on both. Which of these high-end smartphones is better?